23b00730 No.3737903
textbooks
https://www.boredpanda.com/funny-textbook-drawings/Turn to page 69
Turn to page 34 fuck you, oops sorry now
Turn to page 666 saw a drawn detailed penis
23b00730 No.3738016
>>3737997That's a slip of woke ideaology for you.
a658104b No.3738369
>>3738367My own technical books accumulate lots of helpful marginalia. I'd never think of marking them with anything trivial, however.
ae730cf7 No.3738370
>>3738369That's perfectly reasonable. I've never done it to a book, but one of my professors handed out a print-out on central forces that had a bunch of errors I discovered and corrected as I read through.